Electric switch.



H. EisAcHER.

ELECTRIC SWITCH.

APLlCATiGN I'iLd 2M. 13. 19%5.

.Patented July 25, 1916.

UNITED STATES PATENT oEEIcE. Y

HUGO BRISACHER, OF NEW YORK, N. YL, ASSIGNOR OF ONEsHALF TO F. 1?. DODGE, OF NEW YORK, N. Y.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented July 25, 1916.

Application ledil'anuary 13, 1915. Serial No. 1,933.

le it known that l, Hi'oo BinsAciiEn', a citizen of the Republic of Switzerland, and a resident of the borough of Manhattan, city, county,'and State of New York, have invented a iie\Y and useful Improvement in lllecti'ic Switches, ot' which the following is a specification. Y I

My invention relates to iinprovementsin electric switches and has particular application in connection with the well known type of knife-blade switches.

The object of the invention is to assure a perfect electrical contact and the object of the invention is accomplished broadly by providing means for causing a spring engagement between the blade and the con- `tact'jaws or clips.

1n the following is described, in connection with the accompanying drawings, one forni of device embodying my invention, the features thereof being more particularly pointed ont hereinafter in the claims.

In the said drawings Figui-e 1 is a side elevation of an electric switch of the knife blade type showing one form of my invention in connection therewith. Fig. "Z is a plan view of the device shown in Fig. l,

parts being broken away,

Similar'numerals of reference indicate similar part-s throughout the several views.

As illustrated 1 indicates a base of slate or other suitable insulating material to which contact blocks@ .and 3 are secured in Vany suitable manner. Line wire terminals 4 and 5 ai'e secured to blocks 2 and 3 respcctivelyin any suitable manner so as to assure good electrical contact.

(i. 6 indicate a pair of contact clips mounted on block 2 in which blade 7 is hingedly mounted on a suitable pin 8.

9, 9 indicate a pair of contact clips mounted on block 3 and adapted to forni a jaw for the reception of blade 7. Clips 9 are vertically slit so as to form a central spi-'nig leaf 10 and side. leaves 11, 11` the tops of the respective clips being'sprnng firmly secured to blade 7, and normally inclined at their free ends slightly toward theI blade. Spring pieces 12, 12, are narrower ing an outside or independent pressure against the clips thus forcing the contact clips'tightly against the blade and assuring an absolutely perfect contact. llfhen closed lthe blade is between the clips tending to force them apart and the spring pieces 12, 12 are at either side of the clips tending to force them inward against the blade. the clips and the blade being thus held together under spring engagement. As shown, said spring pieces l2, 12 are vpreferably fixed at one end and in electrical contact with the blade 7, the other end heilig free, and further provided with a flattened portion adapted toY make electrical engagement with the fiattened face of the Contact clips; said attened port-ionis usually adjacent the free end and may be provided with a circular or other indentation pressed therein to secure rigidity of said flattened' portieri.

The invention may be applied Ito double as well as single throw switches and in fact finds use in any suitable type of Switch de vice wherein the principles ot' the invention may be applied.

I do not restrict myself either to the de tails of constriartion illustrated or to the general arrangement as described, further than the -scope of the appended claims deiua-nds. l

YI claim:

1. The conibination of a resilient contact having opposite contact faces. a switch blade sl-idingly engaging one of said faces when` said switch blade is in its closed position, and an arm connected at its one end directly to said switch blade and' having its other end free, the portion of said arm adjacent said free end slidiiigly engaging the other of said faces of the resilient contact, when said switch blade is in its closed position, said arm portion extending longitudinally ot' lsaid switch blade and having its circuit breakingvedge advanced relative to the cir cuit breaking edge of said switch blade.

L. 'l`lie combination of a pair of substansilient contacts, a switch blade pivoled t0 )nove in a euhstantially vertical plane and adapted to slidingly engage one face of each said (mnt-acts, oppositely disposed arms of resilient conducting material each having one end fixed to and centrally of said blade and itsV other end free and respectively slidinglhv engaging said contacts on a face opposite to said one' face thereof when said blade is ino'. d to closed position, said arms a't their respective free end portions having a width ,lem than the. width of said blade.

3. The minhination otl a switch blade, a Hat contact adapted to he .slidingly engaged on one face thereof hv said liladc, and an auxiliary contactfhavifng one end fixed to and electrically connected with said blade and having,r its other end free, said auxiliar)Y Contact having a fiat vportion intermediate provided with an indention for stiffeningaid flattened portion.

InY testi'inony whereof I have signed thiA specification in the presence of two suhscrib lng witnesses.

HUG() BRISACHEK. 

